DexBackedAnnotationEncodedValue.java revision 476e704c86155e7c7ad32ad95deea32427c3aa06 
1/*
2 * Copyright 2012, Google Inc.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met:
8 *
9 *     * Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 *     * Redistributions in binary form must reproduce the above
12 * copyright notice, this list of conditions and the following disclaimer
13 * in the documentation and/or other materials provided with the
14 * distribution.
15 *     * Neither the name of Google Inc. nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32package org.jf.dexlib2.dexbacked.value;
33
34import org.jf.dexlib2.dexbacked.DexBuffer;
35import org.jf.dexlib2.dexbacked.DexReader;
36import org.jf.dexlib2.ValueType;
37import org.jf.dexlib2.dexbacked.DexBackedAnnotationElement;
38import org.jf.dexlib2.dexbacked.util.VariableSizeList;
39import org.jf.dexlib2.iface.AnnotationElement;
40import org.jf.dexlib2.iface.value.AnnotationEncodedValue;
41
42import javax.annotation.Nonnull;
43import java.util.List;
44
45public class DexBackedAnnotationEncodedValue implements AnnotationEncodedValue {
46    @Nonnull public final DexBuffer dexBuf;
47    @Nonnull public final String type;
48    private final int elementsOffset;
49
50    public DexBackedAnnotationEncodedValue(@Nonnull DexReader reader) {
51        this.dexBuf = reader.getDexBuffer();
52        this.type = reader.getType(reader.readSmallUleb128());
53        this.elementsOffset = reader.getOffset();
54        skipElements(reader);
55    }
56
57    public static void skipFrom(@Nonnull DexReader reader) {
58        reader.skipUleb128();
59        skipElements(reader);
60    }
61
62    private static void skipElements(@Nonnull DexReader reader) {
63        int elementCount = reader.readSmallUleb128();
64        for (int i=0; i<elementCount; i++) {
65            reader.skipUleb128();
66            DexBackedEncodedValue.skipFrom(reader);
67        }
68    }
69
70    @Override public int getValueType() { return ValueType.ANNOTATION; }
71    @Nonnull @Override public String getType() { return type; }
72
73    @Nonnull
74    @Override
75    public List<? extends AnnotationElement> getElements() {
76        DexReader reader = dexBuf.readerAt(elementsOffset);
77        final int size = reader.readSmallUleb128();
78
79        return new VariableSizeList<AnnotationElement>(dexBuf, reader.getOffset()) {
80            @Nonnull
81            @Override
82            protected AnnotationElement readItem(@Nonnull DexReader dexReader, int index) {
83                return new DexBackedAnnotationElement(dexReader);
84            }
85
86            @Override
87            protected void skipItem(@Nonnull DexReader reader, int index) {
88                DexBackedAnnotationElement.skipFrom(reader);
89            }
90
91            @Override public int size() { return size;}
92        };
93    }
94}
95